Version 0.6.6

• remove redundant slicing (thanks to @zyctree).
• Optimize the BitAnd/Assign and BitOr/Assign operations.

Version 0.6.5

• Improve unions between array stores by writing into a new allocation instead of inserting.
• Improve the RoaringBitmap::deserialize_from method by fetching bigger batches of bytes at a time.
• Remove the local retain_mut function we introduced (#85) by an external library that does it for us (thanks to @upsuper).

Version 0.6.4

• Improve the bitmap intersect and differences operation again.

Version 0.6.3

• Improve the bitmap intersect and differences operation.
• Introduce Treemap serialization (thanks to @vorot93).

Version 0.6.2

• Improve the bitmap to_array conversion (thanks to @damnMeddlingKid).
• Fix a deserialization bug (thanks to @detailyang).
• Add RoaringBitmap::push/append/from_sorted_iter and RoaringTreemap::push/append/from_sorted_iter (thanks again to @zommiommy).
• Add RoaringBitmap::insert_range and RoaringTreemap::insert_range (thanks again to @domodwyer).

Version 0.5.2

 * Add RoaringBitmap::remove_range and RoaringTreemap::remove_range
   (thanks again to @arthurprs)

Version 0.5.1

 * Add RoaringBitmap::serialized_size, RoaringTreemap::bitmaps and
   RoaringTreemap::from_bitmaps (thanks to @arthurprs)

Version 0.5.0

 * No more genericness, only the 32 bit implementation really makes sense.
 * Standard serialization and deserialization support as specified in
   https://github.com/RoaringBitmap/RoaringFormatSpec
 * Massive internal reorganisation, including some visible improvements to the
   docs.
 * Explicit minimal compatible version of Rust 1.11.0.
 * New 64 bit RoaringTreemap added, wraps 32 bit RoaringBitmaps into a
   BTreeMap. See http://r-libre.teluq.ca/930/1/Roaring64bits.pdf for a
   description (in French) of the likely performance tradeoffs. Contributed by
   @bvinc.

Version 0.4.2

 - Fixed dependency on num for new crates.io constraints, see 0.4.1 for real
   changes.

Version 0.4.1

 - Now supports RoaringBitmap<usize> (thanks to @jiangyang)
 - Fixed bug when intersecting bitmaps fully emptied out a container (reported by @aeickhoff)